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block: unify flags for struct bio and struct request

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Remove the current bio flags and reuse the request flags for the bio, too.
This allows to more easily trace the type of I/O from the filesystem
down to the block driver.  There were two flags in the bio that were
missing in the requests:  BIO_RW_UNPLUG and BIO_RW_AHEAD.  Also I've
renamed two request flags that had a superflous RW in them.

Note that the flags are in bio.h despite having the REQ_ name - as
blkdev.h includes bio.h that is the only way to go for now.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Christoph Hellwig
2010-08-07 18:20:39 +02:00
committed by Jens Axboe
parent 33659ebbae
commit 7b6d91daee
47 changed files with 241 additions and 288 deletions
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2
mm/page_io.c
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@ -106,7 +106,7 @@ int swap_writepage(struct page *page, struct writeback_control *wbc)
goto out;
}
if (wbc->sync_mode == WB_SYNC_ALL)
rw |= (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG);
rw |= REQ_SYNC | REQ_UNPLUG;
count_vm_event(PSWPOUT);
set_page_writeback(page);
unlock_page(page);